In-Screed Underfloor Heating Cable Systems In-Screed Underfloor Heating Cable Systems are designed for efficient and reliable underfloor heating in screeded concrete floors. Ideal for new builds and renovations, these cables provide consistent warmth under tile, stone, laminate, and wood floors. Installed within 50-100mm of cement-based screed, they offer excellent heat retention and durable performance with a lifetime warranty. Available Underfloor Heating Cable Sizes & Heating Coverage Choose from a range of cable lengths suitable to heat varied floor areas. Below is the coverage at different power outputs, helping you select the optimal cable for your heating requirements: Cable Length (metres) Coverage - High Heat Loss (200W/m²) Coverage - General Room Heat (160W/m²) Coverage - Background Heat (100W/m²) Total Power Output (Watts) 13.7 1.0 m² 1.3 m² 2.0 m² 200 W 22.0 1.6 m² 2.0 m² 3.3 m² 340 W 28.0 2.1 m² 2.6 m² 4.2 m² 420 W 37.0 2.8 m² 3.5 m² 5.5 m² 550 W 45.0 3.4 m² 4.2 m² 6.7 m² 660 W 52.0 3.9 m² 4.9 m² 7.8 m² 800 W 59.0 4.4 m² 5.5 m² 9.0 m² 880 W 64.0 4.8 m² 6.0 m² 9.6 m² 960 W 72.0 5.4 m² 6.7 m² 10.8 m² 1,070 W 81.0 6.1 m² 7.6 m² 12.0 m² 1,210 W 84.0 6.3 m² 7.9 m² 12.6 m² 1,300 W 105.0 7.9 m² 9.8 m² 15.7 m² 1,580 W 129.0 9.3 m² 11.6 m² 19.0 m² 1,940 W 228.0 16.6 m² 20.6 m² 32.6 m² 3,060 W 339.0 24.6 m² 30.8 m² 48.6 m² 4,545 W 378.0 27.4 m² 34.6 m² 54.0 m² 5,070 W 417.0 30.2 m² 38.4 m² 59.6 m² 5,595 W 456.0 33.0 m² 42.2 m² 65.1 m² 6,120 W 537.0 38.8 m² 49.6 m² 76.1 m² 7,215 W Underfloor Heating Cable Key Features Designed for embedding in 50-100mm thick cement screed Power density options around 200W/m², 160W/m², and 100W/m² for various heating needs Suitable for use under tile, stone, laminate, and wooden floors Durable twin conductor cable with robust insulation and metallic earth screen Lifetime warranty for peace of mind Ideal for rooms with varying heat loss including kitchens, bathrooms, conservatories, and large open-plan areas Technical Specifications Voltage: 230V Cable lengths ranging from 13.7m up to 537m to suit small to very large floor areas Power output varies with cable length and heat density Cable diameter: approx. 6mm Minimum screed cover: 30mm above cable for protection and heat transfer Installation temperature: minimum 5°C Installation Notes Heating cable must not be cut or shortened Fix cable evenly with recommended spacing to ensure uniform heat distribution Should be installed on suitable insulation for maximised efficiency Connection via cold lead to thermostat control Resistance testing before and after installation is mandatory for safety and warranty purposes What’s Included ThermRite™ In-Screed Heating Cable in chosen length Installation instructions Why Choose ThermRite™ In-Screed Cables? ThermRite™ Underfloor Heating Cable offers a robust, economical, and high-performance underfloor heating solution suitable for a broad range of projects. With trusted quality and safety certifications, these cables deliver consistent, comfortable heat embedded within screeded floors. Select the appropriate cable length and power density according to your floor size and heating requirements for optimal comfort and efficiency.
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